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National Stock Number:
1240-00-133-5849
Federal Supply Class:
1240
National Item Identification Number:
001335849
Description:
WINDOW,OPTICAL INSTRUMENT
Detail:
A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.
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Manufacturer Information:
| 10555970 | 19200 | US ARMY ARDEC RDECOM | | 1723 | 14674 | CORNING GLASS WORKS |
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Techincal Specification:
| BEVEL ANGLE IN DEG | 42.000 MINIMUM AND 48.000 MAXIMUM | | BEVEL DEPTH | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM | | DIAMETER | 3.120 INCHES MINIMUM AND 3.125 INCHES MAXIMUM | | FSC APPLICATION DATA | COLLIMATOR,INFINITY AIMING REFERENCE | | MATERIAL | GLASS LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | REFLECTION REDUCING SURFACE | BOTH | | THICKNESS | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM |
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